摘要
以扎龙湿地1996、2004年丹顶鹤巢址数据、同期Landsat TM遥感图像及DMSP/OLS夜间灯光亮度数据为主要信息源,通过最大熵法(Maxent)生态位模型,建立丹顶鹤繁殖生境预测模型,采用情景分析、空间热点探测,研究丹顶鹤繁殖生境变化驱动因素。结果表明:与1996年相比,2004年质量好、质量中等的丹顶鹤繁殖生境面积比例分别下降了287 %、559 %,高质量丹顶鹤繁殖生境(适宜性概率>090)空间聚集性减弱,破碎化趋势增强;人类干扰对丹顶鹤繁殖生境的影响主要体现在囚笼效应,而气候变化则驱使丹顶鹤繁殖生境分布中心向生态环境改善的方向偏移;丹顶鹤繁殖生境适宜性概率显著提高的热点,水文状况、沼泽植物的生长状况在改善,受到人为因素的干扰强度在降低,而生境适宜性概率显著降低的冷点,各项环境因子趋向恶化。
Abstract
Understanding drivers of breeding habitat change of endangered species is the premise of making of wildlife protection plan. Nest site data of redcrowned crane (Grus japonensis) in1996 and 2004, remote sensing images of Landsat TM and DMSP/OLS night time light intensity data at the same periods were collected as the main information source, while the ecological niche model of maximum entropy method (Maxent) was applied to predict breeding habitat of the crane. Then scenario analysis and spatial hot spots exploration were used to study the drivers of breeding habitat change of redcrowned crane. Research results showed that:(1)the area proportion of good and medium quality habitat were dramatically decreased by 287 % and 559 % respectively, while the spatial distribution of high quality breeding habitat for the crane with suitability above 090 were less aggregated and more fragmented;(2) the human disturbance had cage effect on the habitat of endangered bird, while the climate change made the distribution center shift to places with better environmental condition;(3)the hot spots with significantly increased habitat suitability were located at places with improved hydrological and growing conditions of marsh plant,while the cold spots located at places with deteriorated environmental factors.
李明阳,张称意,吴军,徐婷.
扎龙湿地丹顶鹤繁殖生境变化驱动因素分析[J]. 南京林业大学学报(自然科学版). 2012, 36(06): 76-80 https://doi.org/10.3969/j.jssn.1000-2006.2012.06.015
LI Mingyang,ZHANG Chengyi, WU Jun,XU Ting.
Driver analysis of breeding habitat change of redcrowned crane (Grus japonensis) in Zhalong wetland[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY. 2012, 36(06): 76-80 https://doi.org/10.3969/j.jssn.1000-2006.2012.06.015
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基金
收稿日期:2012-05-20修回日期:2012-10-15
基金项目:环境保护部重大公益性行业科研专项项目(200909070)
第一作者:李明阳,教授。 *通信作者: Email: lmy196727@126.com。
引文格式:李明阳,张称意,吴军,等. 扎龙湿地丹顶鹤繁殖生境变化驱动因素分析[J]. 南京林业大学学报:自然科学版,2012,36(6):76-80.